We currently support Windows 7 or later and Mac desktops running OSX Lion 10.7 or later, iPad 3 or later, and select Android tablets running KitKat or above. You can see the minimum specs on our download page.
If you have an Android Tablet and are unsure if your device will play the game, check the Google Play Store to see if you can download the game, if you can not see the game in the games section of the store it means your device is unsupported.
Unfortunately, we do not support Kindle Fire tablets, as these run a custom version of Android which is currently not supported.
We are actively looking at whether we can support the game on phones. However, since the game is primarily designed for bigger screens, this has some design implications which we will need to work through. At this stage, we have no firm date on if we will support phones, but keep an eye on our website for news updates.